Add Docker Image To GitHub Registry

[taljacob2]

Hello,
I have noticed that this repository builds a docker image.

But to use that image, I am required to:

• Clone the git repository
• Build the image locally
• Run the image

Instead, we could ease the process, by pre-building the image, and pushing it to a public docker registry, such as the ghcr (GitHub registry made for the repository).

Changes

• I have added a simple GitHub Actions .yml file, for automatically building & pushing the docker image to the ghcr docker registry of this repository.
• I have updated the README.md with the changes.
• I have noticed that the docker run command, in the README.md runs the container without "detached" mode, which is not commonly used. The better use case is to run the container with "detached" mode. So I updated the README.md to run the commands with "detached" mode (-d).